There must be many non-pilots on Pprune who don't even know what a flight mgmt computer (FMC) is.
And they can't understand the difference between a FCC and a FMC?
Does Airbus use the acronym FCC for what Boeing and others manufacturers call FMC? If these terms are interchangeable in this context, then it could be confusing. Beginning with the B-757/767, the autopilot(s) have the autopilot/flight director systems (AFDS), as described by others here, and IRS for navigation, using VORs to cross-check.
Without fly-by-wire systems, pilots must use awareness and airmanship to avoid exceeding safety/system limitations, i.e. stalling or exceeding g-limits or maximum speeds. Many of us hand-flew the 757 up to FL 180 or even higher. We flew most visual and ILS (with my HSI in the VOR mode) approaches by hand, only very rarely letting the airplane land itself-contrary to many passengers' flawed assumptions (as with so many of their misconceptions).
